Meal Timings, Appetite, Mood and Weight Loss in Individuals on a Commercial Intermittent Fasting Programme

Completed

• Conditions: Weight Loss

• Registration Number: NCT04893772
• Lead Sponsor: King's College London

Brief Summary

Although individuals following commercial intermittent fasting programmes consume meal replacement products during fasting days, further behavioural variables such as time of food consumption, sleep quality and duration, appetite and mood may significantly impact weight loss and intervention success. This project aims to assess behavioural patterns (dietary intake, sleep, meal timing, physical activity), mood and appetite on both fasting and non-fasting days and to investigate whether these are associated with weight loss.

Detailed Description

Not available

Study Timeline

• Status Verified: 2021-05
• Study First Submitted: 2021-05-12
• Study First Submitted QC: 2021-05-17
• Study First Posted: 2021-05-20
• Study Start: 2021-06-30
• Primary Completion: 2021-10-31
• Study Completion: 2021-12-31
• Last Update Submitted: 2023-04-18
• Last Update Posted: 2023-04-19

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 33

Inclusion Criteria

• Those responding to adverts on the LighterLife Fast Challenge social media channels will be asked if they would like to participate

Exclusion Criteria

• Those without access to a smart phone or laptop will not be eligible to take part in the study due to the need to report variables daily

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Body weight in kg	Change in body weight up to 12 weeks	Weighed at home

Secondary Outcome Measures

Name	Time	Method
Meal timings	Before weight loss programme (day 0)	Meal timings questionnaire
Would you like to eat something sweet?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (yes very much) -100 (not at all)
Alcohol use	Before weight loss programme (day 0)	AUDIT questionnaire
How hungry do you feel?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (I am not hungry at all) -100 (I have never been more hungry)
Sleep duration	Daily from day 1 up to 12 weeks	Question: How long did you sleep?
How full do you feel?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (not at all) -100 (totally full)
Mindfulness - I was doing something automatically without being aware of what I was doing	Weekly from week 1 up to 12 weeks	Mindful Attention Awareness Scale (MASS), scale 0 (not at all) to 6 (very much)
Mindfulness - I was rushing through something without really being attentive to it.	Weekly from week 1 up to 12 weeks	Mindful Attention Awareness Scale (MASS), scale 0 (not at all) to 6 (very much)
Height	Before weight loss programme (day 0)	Height in cm
Would you like to eat something savoury?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (yes very much) -100 (not at all)
Mindfulness - I was finding to difficult to stay focused on what I was doing	Weekly from week 1 up to 12 weeks	Mindful Attention Awareness Scale (MASS), scale 0 (not at all) to 6 (very much)
Sleep quality	Daily from day 1 up to 12 weeks	Questions to rate quality of sleep
Physical activity	Daily from day 1 up to 12 weeks	Question: Did you do any structured exercise today?
How satisfied do you feel?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (I am completely empty) -100 (I cannot eat another bite)
Would you like to eat something salty?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (yes very much) -100 (not at all)
Would you like to eat something fatty?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (yes very much) -100 (not at all)
Overall my mood is (very unpleasant to very pleasant)	Daily from day 1 up to 12 weeks	Brief Mood Introspection Scale (BMIS), scale -10 to 10
Mindfulness - I was doing something without paying attention	Weekly from week 1 up to 12 weeks	Mindful Attention Awareness Scale (MASS), scale 0 (not at all) to 6 (very much)
Mindfulness - I was preoccupied with the future or the past	Weekly from week 1 up to 12 weeks	Mindful Attention Awareness Scale (MASS), scale 0 (not at all) to 6 (very much)
Diet quality	Non-fasting days: Weeks 1, 2, 3, 4, 8 and 12	24 h recall x 4 (4 non-fasting days)
Meal replacement product choice	Fasting days: Weeks 1, 2, 3, 4, 8 and 12	Question: Which meal replacement products did you consume?
Meal replacement product timings	Fasting days: Weeks 1, 2, 3, 4, 8 and 12	Question: What time did you consume the meal replacement products?
How much do you think you can eat?	Daily from day 1 up to 12 weeks	Visual Analogue Scales, scale of 0 (nothing at all) -100 (a lot)
Dietary intake (macronutrients and energy)	Non-fasting days: Weeks 1, 2, 3, 4, 8 and 12	24 h recall x 4 (4 non-fasting days)

Trial Locations

Locations (1)

Department of Nutritional Sciences, King's College London; 🇬🇧 London, United Kingdom